Wash your fish of choice. There is no need to pat dry since excess liquid from steaming will be discarded.
Place the fish onto a plate. Spread the ginger on the fish and insert some into the cavity of the fish. If you do not have a plate large enough to hold your fish, you may cut the fish in half before topping it with ginger.
Boil some water in a wok (or steamer large enough to fit the fish)
Place a trivet into the wok. The boiling water should not be higher than the trivet.
Place the plate of fish on the trivet. Close the lid of the wok and steam the fish for 10 minutes. See Note 2.
After 10 minutes, discard the excess liquid on the plate.
Top the fish with the scallion slices.
Heat the oil in a small pot until it smokes, then pour the hot oil directly on the scallions.
Heat the soy sauce, sesame oil, Shaoxing wine and black pepper in a small pot, then pour the sauce directly on the scallions and fish.
All done! Enjoy!